can fence
Regular verb: fence - fenced- fenced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fence
you can fence
she can fence
we can fence
you can fence
they can fence 	I can be fencing
you can be fencing
she can be fencing
we can be fencing
you can be fencing
they can be fencing	I can have fenced
you can have fenced
she can have fenced
we can have fenced
you can have fenced
they can have fenced	I can have been fencing
you can have been fencing
she can have been fencing
we can have been fencing
you can have been fencing
they can have been fencing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't fence
you can't fence
she can't fence
we can't fence
you can't fence
they can't fence 	I can't be fencing
you can't be fencing
she can't be fencing
we can't be fencing
you can't be fencing
they can't be fencing	I can't have fenced
you can't have fenced
she can't have fenced
we can't have fenced
you can't have fenced
they can't have fenced	I can't have been fencing
you can't have been fencing
she can't have been fencing
we can't have been fencing
you can't have been fencing
they can't have been fencing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fence?
can you fence?
can she fence?
can we fence?
can you fence?
can they fence? 	can I be fencing?
can you be fencing?
can she be fencing?
can we be fencing?
can you be fencing?
can they be fencing? 	can I have fenced?
can you have fenced?
can she have fenced?
can we have fenced?
can you have fenced?
can they have fenced? 	can I have been fencing?
can you have been fencing?
can she have been fencing?
can we have been fencing?
can you have been fencing?
can they have been fencing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I fence?
can't you fence?
can't she fence?
can't we fence?
can't you fence?
can't they fence? 	can't I be fencing?
can't you be fencing?
can't she be fencing?
can't we be fencing?
can't you be fencing?
can't they be fencing? 	can't I have fenced?
can't you have fenced?
can't she have fenced?
can't we have fenced?
can't you have fenced?
can't they have fenced? 	can't I have been fencing?
can't you have been fencing?
can't she have been fencing?
can't we have been fencing?
can't you have been fencing?
can't they have been fencing?